A teacher is having students evaluate the effect of environmental heat on plant growth. One student check the thermometer and records the room temperature as 70 degrees and another student checks the thermometer a moment later and records the temperature as 62 degrees. In this example, the measurement of temperature is a. Sufficiently reliable (greater than 86%) and therefore, the data are valid. b. Unreliable and therefore, the data are invalid c. Unreliable, which has no impact on the data's validity d. Unreliable, but the data may still be valid